after some more research i think iv narrowed it down two different CAI systems.

Hyperflow Cold Air Intake
HYPERFLOW | Intercoolers | Catch Cans | WRX | FORD | Active Exhaust | — WRX/STi 01-07 Cold Air Intake(CAI) Kit

Process West Cold Air Intake
PROCESS WEST - WX/STi Products - MY01-07 Cold Air Intake Kit

i think they are both good brands from what iv heard, they are both the exact same price too...ill just swap the pods with my apexi one as the tuners are ASG have said they get the best results with the Apexi pod.

thoughts?